Means for cooling heated surfaces



uy 5 927 E N. FALES 1,635,039

MEANS FOR COOLING HEATED SURFACES Filed March 21, 1923 INVENTOR ELISHIIr1. muss v ATTOR EY Patented July 5, 1927.

PATENT' OFFICE.

ELISHA FALES, OF LAKE FOREST, ILLINOIS.

MEANS FOR COOLING HEATED SURFACES.

Application filed March 21, 1923.

. 'Ihis inventionrelates to the art of cooling heated surfaces andparticularly the cylinders of internal combustion engines.

Theobject of the invention is to efliciently cool and maintain ateffective thermal efficiency, the cylinders of an engine by the use ofair under such conditions as to conserve the expenditure of energy whileobtaining the requisite velocity of air flow and the necessary airpressure.

\Vith the above and other objects in View, the invention consists in thenovel construction, combination and arrangement herein described, shown,and claimed.

In the accompanying drawings:

Fig. 1 is a front elevation of one form of my invention showing the airjacket in section. r

Fig.- 2 is a side elevation of the arrangement shown in Fig. '1.

Fig. 3 is a side elevation of a modification showing the air jacket insection.

eferring to the drawings, 1 designates an engine having cylinders 2provided with air cooling flanges or fins 3 which extendcircuinferentially around the cylinders and transversely of the air flowas will appear.

These fins 3 are of graded sizes asshown so that large air eddies willbe set up as shown by arrow a between the large fins, and also smallereddies b will be set up between each of the adjacent fins. The greatestcooling effect will be obtained by using fins of this character whichare positioned at right angles to the cooling air flow.

As shown in Figures 1 and 2 the engine cylinder is surrounded by the airjacket 4, which is outwardly flared at 5 at the upper end. The lower endof the air jacket is also outwardly flared as at 6 in such a manner asto provide a constantly and gradually increasing cross sectional areatopermit the Serial N 0. 626,548.

gradual expansion of the heated air before its discharge to the outsideair. A fan 7 is provided at the upper end to cause a downward blast ofair. It will be seen that the arrangement described imparts to the airpassageway a changing cross sectional area analogous to that in aVenturi tube efficiently inducing the necessary air flow velocity andpressure by utilizing the expansion of the heated gas to help inducethis air flow.

In Figure 3 invention is shown as applied to a four cylinder engine, theair jacket 8 being outwardly flared at its upper end as at 9 in order tocause a high velocity of the air flow past the heated cylinders. Theheated air is drawn out of the lower end of the air-jacket by suctionfans 10, 11 and 12 of graduated sizes, operating in a fan casing 13,which communicates with the outlet flared portion 14 of the air jacket.

The fans 10, 11 and 12 and the corresponding parts of the casing 13 areof progressively constricted diameters to correspond to the altering airflow velocity, and the discharge end portion 14 is so shaped as toefiicientiy utilize the energy expended in approaching atmosphericconditions to help induce the air I claim- Cooling means for thecylinders of an internal combustion engine including a plurality ofcooling flanges on the cylinders interposed with each other said flangeshaving uniformly increasing and decreasing diameters and an airconfining acket surrounding the cylinders and spaced therefrom, andhaving entrance and exit passages located to cause a turbulent aircurrent past the cylinders by contact with the flanges of differentsizes at right angles thereto.

In testimony whereof I affix my signature.

ELISHA N. FALES.

